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Factors affecting enzyme action (cognito)
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Created by
Hooria Nadeem
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Cards (15)
What factors affect the functioning of enzymes?
Temperature
and
pH
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How does temperature affect the rate of enzyme-controlled reactions?
Higher temperature increases
reaction rate
initially
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Why does the rate of reaction increase with temperature?
Particles have more
kinetic energy
and collide more
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What happens to the rate of reaction after 37°C?
The rate starts to
drop
rapidly
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Why does the rate of reaction drop after high temperatures?
High temperatures break bonds in
enzymes
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At what temperature does enzyme denaturation occur?
Around
45°C
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What is the optimum temperature for enzymes?
The temperature at which
reaction rate
is highest
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What is the optimum temperature for most enzymes in the body?
37°C
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How does pH affect enzyme activity?
Extreme pH levels lower the
reaction rate
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What happens to the enzyme's active site when pH changes?
It changes
shape
,
affecting substrate binding
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What is the optimal pH for most enzymes in the body?
Around pH
7
(neutral)
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What is the optimal pH for enzymes in the stomach?
Around
pH 2
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What are the effects of temperature and pH on enzymes?
Temperature increases
reaction rate
until
denaturation
Optimal temperature is around
37°C
for most enzymes
pH affects reaction rate; extreme pH can denature enzymes
Optimal pH is around 7 for most enzymes, 2 for
stomach
enzymes
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What is the term for when an enzyme can no longer catalyze a reaction?
Denatured
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What happens to the substrate when the enzyme is denatured?
The
substrate
can no longer
fit
into the
active
site
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